| Artist/Group | Album Title | Year | Origin | Label | Price (US) |
| ODYSSEY | Setting Forth | 197? | USA | Timothy's Brain | 18 |
| OKO | Raskorak | 1976 | Yugoslavia | Sazas | 15 |
| The OPEN MIND | The Open Mind (digipak) | 1969 | UK | Second Battle | 35 |
| ORA | Ora | 1969 | UK | Background | 20 |
| ORANG UTAN | Orang Utan | 1971 | USA | Lizard | 18 |
| OSANNA | Colonna sonora del film Milano Calibro 9 | 1972 | Italy | Warner Fonit | 18 |
| OUT OF FOCUS | Out Of Focus | 1971 | Germany | Kuckuck | 18 |
| OUT OF FOCUS | Wake Up | 1971 | Germany | Kuckuck | 18 |
| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | P | Q | R | S | T | U | V | W | X | Y | Z |
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